#pragma once

#include <iostream>
#include <string>
#include <cstring>
#include <cstdlib>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/wait.h>
#include <signal.h>
#include <pthread.h>

#include "log.hpp"
#include "Task.hpp"
#include "ThreadPool.hpp"

namespace server
{
    enum
    {
        USAGE_ERR = 1,
        SOCKET_ERR,
        BIND_ERR,
        LISTEN_ERR
    };

    static const uint16_t gport = 8080;
    static const int gbacklog = 5;
    class TcpServer;

    class ThreadData
    {
    public:
        ThreadData(TcpServer *self, int sock) : _self(self), _sock(sock)
        {
        }

    public:
        TcpServer *_self;
        int _sock;
    };

    class TcpServer
    {
    public:
        TcpServer(const uint16_t &port = gport) : _listensock(-1), _port(port)
        {
        }
        void initServer()
        {
            // 1. 创建socket文件套接字对象
            _listensock = socket(AF_INET, SOCK_STREAM, 0);
            if (_listensock < 0)
            {
                logMessage(FATAL, "create socket error");
                exit(SOCKET_ERR);
            }
            logMessage(NORMAL, "create socket success: %d", _listensock);

            // 2. bind绑定自己的网络信息
            struct sockaddr_in local;
            memset(&local, 0, sizeof(local));
            local.sin_family = AF_INET;
            local.sin_port = htons(_port);
            local.sin_addr.s_addr = INADDR_ANY;
            if (bind(_listensock, (struct sockaddr *)&local, sizeof(local)) < 0)
            {
                logMessage(FATAL, "bind socket error");
                exit(BIND_ERR);
            }
            logMessage(NORMAL, "bind socket success");

            // 3. 设置socket 为监听状态
            if (listen(_listensock, gbacklog) < 0) // 第二个参数backlog后面在填这个坑
            {
                logMessage(FATAL, "listen socket error");
                exit(LISTEN_ERR);
            }
            logMessage(NORMAL, "listen socket success");
        }
        void start()
        {
            // 4. 线程池初始化
            ThreadPool<Task>::getInstance()->run();
            logMessage(NORMAL, "Thread init success");
            // signal(SIGCHLD, SIG_IGN);
            for (;;)
            {
                // 4. server 获取新链接
                // sock, 和client进行通信的fd
                struct sockaddr_in peer;
                socklen_t len = sizeof(peer);
                int sock = accept(_listensock, (struct sockaddr *)&peer, &len);
                if (sock < 0)
                {
                    logMessage(ERROR, "accept error, next");
                    continue;
                }
                logMessage(NORMAL, "accept a new link success, get new sock: %d", sock); // ?
                logMessage(DEBUG, "accept error, next");
                logMessage(WARNING, "accept error, next");
                logMessage(FATAL, "accept error, next");
                logMessage(NORMAL, "accept error, next");

                logMessage(NORMAL, "accept a new link success, get new sock: %d", sock); // ?
                logMessage(DEBUG, "accept error, next");
                logMessage(WARNING, "accept error, next");
                logMessage(FATAL, "accept error, next");
                logMessage(NORMAL, "accept error, next");

                logMessage(NORMAL, "accept a new link success, get new sock: %d", sock); // ?
                logMessage(DEBUG, "accept error, next");
                logMessage(WARNING, "accept error, next");
                logMessage(FATAL, "accept error, next");
                logMessage(NORMAL, "accept error, next");

                // 5. 这里就是一个sock，未来通信我们就用这个sock，面向字节流的，后续全部都是文件操作！
                // version 1
                // serviceIO(sock);
                // close(sock); //对一个已经使用完毕的sock，我们要关闭这个sock，要不然会导致，文件描述符泄漏

                // version 2 多进程版(2)
                // pid_t id = fork();
                // if (id == 0) // child
                // {
                //     close(_listensock);
                //     //if(fork()>0) exit(0);
                //     serviceIO(sock);
                //     close(sock);
                //     exit(0);
                // }
                // close(sock);

                // //father
                // pid_t ret = waitpid(id, nullptr, 0);
                // if(ret>0)
                // {
                //     std::cout << "waitsuccess: " << ret << std::endl;
                // }

                // version3 多线程版
                // pthread_t tid;
                // ThreadData* td = new ThreadData(this, sock);
                // pthread_create(&tid,nullptr, threadRoutine, td);
                // // pthread_join(tid, nullptr);

                // version4 线程池
                ThreadPool<Task>::getInstance()->push(Task(sock, serviceIO));
            }
        }
        // static void *threadRoutine(void *args)
        // {
        //     pthread_detach(pthread_self());
        //     ThreadData *td = static_cast<ThreadData *>(args);
        //     td->_self->serviceIO(td->_sock);
        //     close(td->_sock);
        //     delete td;
        //     return nullptr;
        // }

        ~TcpServer() {}

    private:
        int _listensock; // 不是用来进行数据通信的，它是用来监听链接到来，获取新链接的！
        uint16_t _port;
    };

} // namespace server